A ventilation duct support device

Abstract

The invention discloses a ventilation duct support device, which relates to the technical field of ventilation duct support, comprising a top mounting half ring, a clamping plate is provided at the end of the top mounting half ring, a sliding ring mechanism is provided outside the clamping plate, a placement groove mechanism is provided on the sliding ring mechanism, a plurality of auxiliary ring mechanisms are provided on the placement groove mechanism, a limiting clamping plate mechanism is provided at the end of the top mounting half ring, two limiting card belt mechanisms are provided on the top mounting half ring, the top mounting half ring is fixedly connected to a mounting base, the mounting base is hinged to a mounting shaft, a deflection damping mechanism is provided between the mounting base and the mounting shaft, the mounting shaft is fixedly connected to a mounting fan mechanism, and a top mounting mechanism is provided on the mounting fan mechanism. The invention can realize the connection between the top mounting half ring and the sliding ring mechanism by arranging the clamping plate, can be used to install the auxiliary ring mechanism by using the placement groove mechanism, can limit the relative positions of the top mounting half ring and the sliding ring mechanism by using the limiting clamping plate mechanism, thereby improving the efficiency of the ventilation duct installation support.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation duct support, in particular to a ventilation duct support device. Background Art

[0002] Ventilation duct is the abbreviation of ventilation pipe, which is a metal or non-metal pipe used for ventilation and air conditioning engineering in industrial and civil buildings. Ventilation duct is a kind of municipal infrastructure to make air circulate and reduce the concentration of harmful gases.

[0003] In the prior art, by setting fixings and bolts, the device can be fixed on the horizontal frame on the ceiling of the factory building, and then the ventilation duct can be lifted by starting the electric push rod. By setting a second movable sleeve, a second threaded hole and a second movable plate, the longitudinal movable range of the ventilation duct can be limited by adjusting the second movable plate, thereby improving the stability of the ventilation duct when it is fixed. However, in the prior art, it is not convenient to install and fix ventilation ducts of different sizes and shapes, so the prior art has a large room for improvement. Summary of the invention

[0004] The present invention provides a ventilation duct supporting device, which solves the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A ventilation duct support device comprises a top mounting half ring, a clamping plate is provided at the end of the top mounting half ring, a sliding ring mechanism is provided outside the clamping plate, a placement groove mechanism is provided on the sliding ring mechanism, a plurality of auxiliary ring mechanisms are provided on the placement groove mechanism, a limiting clamping plate mechanism is provided at the end of the top mounting half ring, two limiting tape mechanisms are provided on the top mounting half ring, the top mounting half ring is fixedly connected to a mounting base, the mounting base is hinged to a mounting shaft, a deflection damping mechanism is provided between the mounting base and the mounting shaft, the mounting shaft is fixedly connected to a mounting fan mechanism, and a top mounting mechanism is provided on the mounting fan mechanism; the placement groove mechanism is used to place the auxiliary ring mechanism, the limiting clamping plate mechanism is used to fix the relative positions of the top mounting half ring and the sliding ring mechanism, the deflection damping mechanism is used to dampen the ventilation duct, the deflection damping mechanism is used to install the mounting fan mechanism, and the mounting fan mechanism is used to install and fix the device.

[0007] As a preferred technical solution of the present invention, the sliding ring mechanism includes a sliding half ring, a card slot is provided in the sliding half ring, the card slot is located in the card slot, and the card and the sliding half ring are slidably connected.

[0008] As a preferred technical solution of the present invention, the placement groove mechanism includes a placement groove opened on the sliding half ring, and a plurality of first positioning grooves are arranged in the circumferential direction of the side edge of the sliding half ring.

[0009] As a preferred technical solution of the present invention, the auxiliary ring mechanism includes a placement block arranged in the placement groove, the placement block and the sliding half ring are slidably connected, the placement block is fixedly connected to the pulling sleeve, the pulling sleeve is fixedly connected to the first spring, the first spring is fixedly connected to the pulling block, the pulling block is fixedly connected to the pulling rod, the pulling rod is fixedly connected to the auxiliary mounting ring, the auxiliary mounting ring is fixedly connected to the first positioning rod, and the outer diameter of the first positioning rod is smaller than the inner diameter of the first positioning groove.

[0010] As a preferred technical solution of the present invention, the limit clamping plate mechanism includes a sliding rod fixed to the end of the top mounting semi-ring, the sliding rod passes through the sliding semi-ring and is slidably connected to the sliding semi-ring, a hole groove is provided on the sliding rod, the sliding rod is rotatably connected to the first threaded rod, the first threaded rod is fixedly connected to the first handle, the first threaded rod is threadedly connected to the adjustment plate, the adjustment plate is fixedly connected to the first displacement seat, the first displacement seat is rotatably connected to the adjustment rod, the adjustment rod is rotatably connected to the second displacement seat, the sliding rod is rotatably connected to the limit clamping plate shaft, the limit clamping plate shaft is rotatably connected to the limit clamping plate, and the limit clamping plate and the second displacement seat are fixedly connected.

[0011] As a preferred technical solution of the present invention, the limiting cassette mechanism includes a second threaded rod rotatably connected to the top mounting half ring, the second threaded rod fixedly connected to the second handle, the second threaded rod threadedly connected to the feed card frame, the feed card frame passes through the top mounting half ring and is slidably connected to the top mounting half ring, the feed card frame is fixedly connected to two winding sleeve seats, the two winding sleeve seats are symmetrically arranged on the feed card frame, the winding sleeve seats are rotatably connected to the winding sleeves, the winding sleeves are fixedly connected to the rubber cassettes, the rubber cassettes are wound on the outer surface of the winding sleeves, the winding sleeves are fixedly connected to a torsion spring, the torsion spring is fixedly connected to the fixed shaft, and the fixed shaft and the winding sleeve seat are fixedly connected.

[0012] As a preferred technical solution of the present invention, the deflection damping mechanism includes a rotating block groove opened on the mounting base, a rotating block is provided in the rotating block groove, the rotating block and the mounting base are slidably connected, the rotating block is fixedly connected to the third displacement seat, the third displacement seat is rotatably connected to the damping mechanism, the damping mechanism is rotatably connected to the fourth displacement seat, the fourth displacement seat is fixedly connected to the mounting sleeve, the mounting sleeve is rotatably connected to the mounting shaft, the damping mechanism includes a damping sleeve rotatably connected to the third displacement seat, a second spring is fixedly connected to the damping sleeve, the second spring is fixedly connected to the damping block, the damping block is fixedly connected to the damping rod, the damping rod passes through the damping sleeve, and the damping rod and the fourth displacement seat are rotatably connected.

[0013] As a preferred technical solution of the present invention, the mounting fan mechanism includes a mounting fan fixed on the mounting shaft, the mounting fan is provided with an arc groove and a mounting through groove, and the mounting fan is provided with a plurality of second positioning grooves.

[0014] As a preferred technical solution of the present invention, the top mounting mechanism includes a mounting frame, the mounting frame is fixedly connected to a block, the mounting frame is fixedly connected to a third spring, the third spring is fixedly connected to a spring mounting plate, the spring mounting plate is fixedly connected to a second positioning rod, the second positioning rod passes through the mounting frame and the second positioning slot, the mounting frame is fixedly connected to a fixing plate, and a plurality of expansion bolts are provided on the fixing plate.

[0015] The present invention has the following benefits:

[0016] By setting the card plate, the connection between the top mounting half ring and the sliding ring mechanism can be achieved, the placement groove mechanism can be used to install the auxiliary ring mechanism, the electrical pipeline can be installed by installing the auxiliary ring mechanism, the relative position of the top mounting half ring and the sliding ring mechanism can be limited by the limiting card plate mechanism, the ventilation ducts of different sizes and shapes can be fixed by the limiting tape mechanism, the ventilation ducts can be cushioned by the deflection cushioning mechanism, the top mounting mechanism can be installed by installing the fan mechanism, and the angle of the top mounting mechanism can be adjusted according to actual conditions, and the top mounting mechanism can be connected to the wall, thereby improving the efficiency of the ventilation duct installation support. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a structural schematic diagram of a ventilation duct support device.

[0018] Figure 2 This is a structural schematic diagram of the ventilation duct support device from a second perspective.

[0019] Figure 3 This is a structural schematic diagram of the ventilation duct support device from the third perspective.

[0020] Figure 4 for Figure 1 A partial enlarged view of area A.

[0021] Figure 5 It is a cross-sectional view of the auxiliary ring mechanism in the ventilation duct support device.

[0022] Figure 6 It is a cross-sectional view of the limit clamping plate mechanism in the ventilation duct support device.

[0023] Figure 7 It is a cross-sectional view of the limiting card belt mechanism in the ventilation duct support device.

[0024] Figure 8 It is a cross-sectional view of the shock absorbing mechanism in the ventilation duct support device.

[0025] In the figure: 1, top mounting half ring; 2, card plate; 3, sliding ring mechanism; 301, sliding half ring; 302, card plate groove; 4, placement groove mechanism; 401, placement groove; 402, first positioning groove; 5, auxiliary ring mechanism; 501, placement block; 502, pulling sleeve; 503, first spring; 504, pulling block; 505, pulling rod; 506, auxiliary mounting ring; 507, first positioning rod; 6, limit card Plate mechanism; 601, slide bar; 602, hole groove; 603, first threaded rod; 604, first handle; 605, adjustment plate; 606, first displacement seat; 607, adjustment rod; 608, second displacement seat; 609, limit clamping plate shaft; 610, limit clamping plate; 7, limit cassette mechanism; 701, second threaded rod; 702, second handle; 703, feed clamping frame; 704, winding sleeve seat; 705 , winding sleeve; 706, rubber cassette; 707, torsion spring; 708, fixed shaft; 8, mounting base; 9, mounting shaft; 10, deflection damping mechanism; 1001, rotating block groove; 1002, rotating block; 1003, third displacement seat; 1004, damping mechanism; 10041, damping sleeve; 10042, second spring; 10043, damping block; 10044, damping rod; 1005, Fourth displacement seat; 1006, installation sleeve; 11, installation fan mechanism; 1101, installation fan; 1102, arc groove; 1103, installation through groove; 1104, second positioning groove; 12, top installation mechanism; 1201, installation frame; 1202, stopper; 1203, third spring; 1204, spring installation plate; 1205, second positioning rod; 1206, fixing plate; 1207, expansion bolt. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] It should be noted that the directions or positional relationships indicated by terms such as “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0028] Example 1, please refer to Figure 1-Figure 8A ventilation duct support device comprises a top mounting half ring 1, a card plate 2 is provided at the end of the top mounting half ring 1, a sliding ring mechanism 3 is provided outside the card plate 2, a placement groove mechanism 4 is provided on the sliding ring mechanism 3, a plurality of auxiliary ring mechanisms 5 are provided on the placement groove mechanism 4, a limiting card plate mechanism 6 is provided at the end of the top mounting half ring 1, two limiting card belt mechanisms 7 are provided on the top mounting half ring 1, the top mounting half ring 1 is fixedly connected to a mounting base 8, the mounting base 8 is hinged to a mounting shaft 9, a deflection damping mechanism 10 is provided between the mounting base 8 and the mounting shaft 9, the mounting shaft 9 is fixedly connected to a mounting fan mechanism 11, and a top mounting mechanism 12 is provided on the mounting fan mechanism 11; the placement groove mechanism 4 is used to place the auxiliary ring mechanism 5, the limiting card plate mechanism 6 is used to fix the relative positions of the top mounting half ring 1 and the sliding ring mechanism 3, the deflection damping mechanism 10 is used to dampen the ventilation duct, the deflection damping mechanism 10 is used to install the mounting fan mechanism 11, and the mounting fan mechanism 11 is used to install and fix the device.

[0029] The placement groove mechanism 4 includes a placement groove 401 provided on the sliding half ring 301, and a plurality of first positioning grooves 402 are provided on the circumferential side of the sliding half ring 301. The auxiliary ring mechanism 5 includes a placement block 501 provided in the placement groove 401, the placement block 501 and the sliding half ring 301 are slidably connected, the placement block 501 is fixedly connected to a pulling sleeve 502, a first spring 503 is fixedly connected inside the pulling sleeve 502, the first spring 503 is fixedly connected to a pulling block 504, the pulling block 504 is fixedly connected to a pull rod 505, the pull rod 505 is fixedly connected to an auxiliary mounting ring 506, the auxiliary mounting ring 506 is fixedly connected to a first positioning rod 507, and the outer diameter of the first positioning rod 507 is smaller than the inner diameter of the first positioning groove 402.

[0030] Specifically, the placement block 501 is placed in the placement groove 401. At this time, under the pulling of the first spring 503, the pulling block 504 and the pulling rod 505 are pulled, and then the auxiliary mounting ring 506 is pulled, so that the first positioning rod 507 is inserted into the first positioning groove 402 to limit the position of the auxiliary mounting ring 506.

[0031] The sliding ring mechanism 3 comprises a sliding half ring 301 , in which a card slot 302 is provided, in which the card slot 302 is located, and the card slot 2 is located, and the card slot 2 and the sliding half ring 301 are slidably connected. The limit card mechanism 6 includes a sliding rod 601 fixed to the end of the top mounting half ring 1, the sliding rod 601 passes through the sliding half ring 301 and is slidably connected to the sliding half ring 301, a hole groove 602 is provided on the sliding rod 601, the sliding rod 601 is rotatably connected to the first threaded rod 603, the first threaded rod 603 is fixedly connected to the first handle 604, the first threaded rod 603 is threadedly connected to the adjustment plate 605, the adjustment plate 605 is fixedly connected to the first displacement seat 606, the first displacement seat 606 is rotatably connected to the adjustment rod 607, the adjustment rod 607 is rotatably connected to the second displacement seat 608, the sliding rod 601 is rotatably connected to the limit card shaft 609, the limit card shaft 609 is rotatably connected to the limit card 610, and the limit card 610 is fixedly connected to the second displacement seat 608.

[0032] Specifically, after the slide rod 601 passes through the sliding half ring 301, the first handle 604 is rotated to drive the first threaded rod 603 to rotate, and then drive the adjustment plate 605 to change position, so that the adjustment rod 607 is changed, which is used to drive the limiting card plate 610 to rotate around the limiting card plate axis 609, so as to limit the slide rod 601 and complete the relative position fixing of the sliding half ring 301 and the top installation half ring 1.

[0033] The limiting cassette mechanism 7 includes a second threaded rod 701 rotatably connected to the top mounting half ring 1, the second threaded rod 701 is fixedly connected to the second handle 702, the second threaded rod 701 is threadedly connected to the feed card frame 703, the feed card frame 703 passes through the top mounting half ring 1 and is slidably connected to the top mounting half ring 1, the feed card frame 703 is fixedly connected to two winding sleeve seats 704, the two winding sleeve seats 704 are symmetrically arranged on the feed card frame 703, the winding sleeve seats 704 are rotatably connected to the winding sleeve 705, the winding sleeves 705 are fixedly connected with a rubber cassette 706, the rubber cassette 706 is wound on the outer surface of the winding sleeve 705, the winding sleeve 705 is fixedly connected with a torsion spring 707, the torsion spring 707 is fixedly connected to a fixed shaft 708, and the fixed shaft 708 and the winding sleeve seat 704 are fixedly connected.

[0034] Specifically, the second handle 702 is rotated to drive the second threaded rod 701 to rotate, thereby driving the feed frame 703 to feed, realizing the feeding of the rubber tape 706, so that the feed frame 703 can be against the ventilation duct with a circular or square cross-section. The rubber tape 706 can prevent the ventilation duct from deflecting, thereby limiting the ventilation duct.

[0035] The mounting fan mechanism 11 includes a mounting fan 1101 fixed on the mounting shaft 9, the mounting fan 1101 is provided with an arc groove 1102 and a mounting through groove 1103, and the mounting fan 1101 is provided with a plurality of second positioning grooves 1104. The top mounting mechanism 12 includes a mounting frame 1201, the mounting frame 1201 is fixedly connected to a stopper 1202, the mounting frame 1201 is fixedly connected to a third spring 1203, the third spring 1203 is fixedly connected to a spring mounting plate 1204, the spring mounting plate 1204 is fixedly connected to a second positioning rod 1205, the second positioning rod 1205 passes through the mounting frame 1201 and the second positioning groove 1104, the mounting frame 1201 is fixedly connected to a fixing plate 1206, and a plurality of expansion bolts 1207 are provided on the fixing plate 1206.

[0036] Specifically, the mounting frame 1201 passes through the mounting slot 1103 and moves along the arc slot 1102. When the mounting frame 1201 moves to the specified position, the second positioning rod 1205 is inserted into the second positioning slot 1104 to limit the position of the mounting frame 1201 and the position of the fixing plate 1206. The fixing plate 1206 is connected to the wall through the expansion bolts 1207.

[0037] Example 2, continue to refer to Figure 1-Figure 4 In the embodiment of the present invention, the deflection damping mechanism 10 includes a rotating block groove 1001 opened on the mounting base 8, a rotating block 1002 is arranged in the rotating block groove 1001, the rotating block 1002 is slidably connected to the mounting base 8, the rotating block 1002 is fixedly connected to the third displacement seat 1003, the third displacement seat 1003 is rotatably connected to the damping mechanism 1004, the damping mechanism 1004 is rotatably connected to the fourth displacement seat 1005, and the fourth displacement seat 1005 is fixedly connected to the mounting sleeve 1006 The mounting sleeve 1006 is rotatably connected to the mounting shaft 9, the damping mechanism 1004 includes a damping sleeve 10041 rotatably connected to the third displacement seat 1003, the damping sleeve 10041 is fixedly connected to the second spring 10042, the second spring 10042 is fixedly connected to the damping block 10043, the damping block 10043 is fixedly connected to the damping rod 10044, the damping rod 10044 passes through the damping sleeve 10041, and the damping rod 10044 is rotatably connected to the fourth displacement seat 1005.

[0038] Specifically, when the ventilation duct is vibrated, the mounting base 8 and the mounting shaft 9 will be driven to rotate relative to each other. Due to the existence of the shock absorbing mechanism 1004, shock absorbing can be achieved. At the same time, the rotating block 1002 can drive the shock absorbing mechanism 1004 to rotate and displace along the rotating block groove 1001.

[0039] During the implementation of the present invention, first, the top mounting mechanism 12 is installed at different positions of the fan mounting mechanism 11 according to the different inclination angles between the ventilation duct and the ground, and then the connection with the wall is achieved through the top mounting mechanism 12. At this time, the ventilation duct to be installed passes through the top mounting half ring 1, and then the sliding ring mechanism 3 is made to slide, so that the limiting card plate mechanism 6 passes through the sliding ring mechanism 3, and the relative positions of the top mounting half ring 1 and the sliding ring mechanism 3 are fixed by the limiting card plate mechanism 6. At this time, the ventilation duct is limited and fixed by the limiting card belt mechanism 7. The deflection damping mechanism 10 can achieve damping when the ventilation duct is vibrated. If it is necessary to install auxiliary electrical pipelines, the auxiliary ring mechanism 5 is placed on the placement groove mechanism 4, and the electrical pipelines are installed through the auxiliary ring mechanism 5.

[0040] The present invention can achieve the connection between the top mounting half ring 1 and the sliding ring mechanism 3 by arranging the card plate 2, can be used to install the auxiliary ring mechanism 5 by placing the groove mechanism 4, can install the electrical pipeline by installing the auxiliary ring mechanism 5, can limit the relative position of the top mounting half ring 1 and the sliding ring mechanism 3 by the limiting card plate mechanism 6, can fix the ventilation ducts of different sizes and shapes by the limiting card belt mechanism 7, can cushion the ventilation ducts by the deflection cushioning mechanism 10, can install the top mounting mechanism 12 by installing the fan mechanism 11, and can adjust the angle of the top mounting mechanism 12 according to actual conditions, can be connected to the wall by the top mounting mechanism 12, and improves the efficiency of the ventilation duct installation support.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ventilation duct support device, comprising a top mounting half ring, characterized in that: A card plate is provided at the end of the top mounting semi-ring, a sliding ring mechanism is provided outside the card plate, a placement groove mechanism is provided on the sliding ring mechanism, a plurality of auxiliary ring mechanisms are provided on the placement groove mechanism, a limit card plate mechanism is provided at the end of the top mounting semi-ring, two limit card belt mechanisms are provided on the top mounting semi-ring, the top mounting semi-ring is fixedly connected to the mounting base, the mounting base is hinged to the mounting shaft, a deflection damping mechanism is provided between the mounting base and the mounting shaft, the mounting shaft is fixedly connected to the mounting fan mechanism, and a top mounting mechanism is provided on the mounting fan mechanism; the placement groove mechanism is used to place the auxiliary ring mechanism, the limit card plate mechanism is used to fix the relative positions of the top mounting semi-ring and the sliding ring mechanism, the deflection damping mechanism is used to dampen the ventilation duct, the deflection damping mechanism is used to install the mounting fan mechanism, and the mounting fan mechanism is used to install and fix the device; The sliding ring mechanism comprises a sliding half ring, a card slot is provided in the sliding half ring, the card slot is located in the card slot, and the card slot and the sliding half ring are slidably connected; The limit clamping plate mechanism includes a sliding rod fixed to the end of the top mounting semi-ring, the sliding rod passes through the sliding semi-ring and is slidably connected to the sliding semi-ring, a hole groove is provided on the sliding rod, the sliding rod is rotatably connected to the first threaded rod, the first threaded rod is fixedly connected to the first handle, the first threaded rod is threadedly connected to the adjustment plate, the adjustment plate is fixedly connected to the first displacement seat, the first displacement seat is rotatably connected to the adjustment rod, the adjustment rod is rotatably connected to the second displacement seat, the sliding rod is rotatably connected to the limit clamping plate shaft, the limit clamping plate shaft is rotatably connected to the limit clamping plate, and the limit clamping plate and the second displacement seat are fixedly connected; The limiting cassette mechanism includes a second threaded rod rotatably connected to the top mounting half ring, the second threaded rod is fixedly connected to the second handle, the second threaded rod is threadedly connected to the feed frame, the feed frame passes through the top mounting half ring and is slidably connected to the top mounting half ring, the feed frame is fixedly connected to two winding sleeve seats, the two winding sleeve seats are symmetrically arranged on the feed frame, the winding sleeve seats are rotatably connected to the winding sleeves, the winding sleeves are fixedly connected to the rubber cassettes, the rubber cassettes are wound on the outer surface of the winding sleeves, the winding sleeves are fixedly connected to the torsion spring, the torsion spring is fixedly connected to the fixed shaft, and the fixed shaft and the winding sleeve seat are fixedly connected; The deflection damping mechanism includes a rotating block groove opened on the mounting base, a rotating block is provided in the rotating block groove, the rotating block and the mounting base are slidably connected, the rotating block is fixedly connected to the third displacement seat, the third displacement seat is rotatably connected to the damping mechanism, the damping mechanism is rotatably connected to the fourth displacement seat, the fourth displacement seat is fixedly connected to the mounting sleeve, the mounting sleeve is rotatably connected to the mounting shaft, the damping mechanism includes a damping sleeve rotatably connected to the third displacement seat, a second spring is fixedly connected to the damping sleeve, the second spring is fixedly connected to the damping block, the damping block is fixedly connected to the damping rod, the damping rod passes through the damping sleeve, and the damping rod is rotatably connected to the fourth displacement seat.

2. The ventilation duct support device according to claim 1, characterized in that: The placement groove mechanism comprises a placement groove arranged on the sliding half ring, and a plurality of first positioning grooves are arranged in the circumferential direction of the side edge of the sliding half ring.

3. The ventilation duct support device according to claim 2, characterized in that: The auxiliary ring mechanism includes a placement block arranged in the placement groove, the placement block and the sliding half ring are slidably connected, the placement block is fixedly connected to the pulling sleeve, the pulling sleeve is fixedly connected to the first spring, the first spring is fixedly connected to the pulling block, the pulling block is fixedly connected to the pulling rod, the pulling rod is fixedly connected to the auxiliary mounting ring, the auxiliary mounting ring is fixedly connected to the first positioning rod, and the outer diameter of the first positioning rod is smaller than the inner diameter of the first positioning groove.

4. The ventilation duct support device according to claim 1, characterized in that: The mounting fan mechanism comprises a mounting fan fixed on the mounting shaft, an arc groove and a mounting through groove are arranged on the mounting fan, and a plurality of second positioning grooves are arranged on the mounting fan.

5. The ventilation duct support device according to claim 4, characterized in that: The top mounting mechanism includes a mounting frame, the mounting frame is fixedly connected to a block, the mounting frame is fixedly connected to a third spring, the third spring is fixedly connected to a spring mounting plate, the spring mounting plate is fixedly connected to a second positioning rod, the second positioning rod passes through the mounting frame and the second positioning slot, the mounting frame is fixedly connected to a fixing plate, and a plurality of expansion bolts are provided on the fixing plate.

Images